Abstract: A digital lighting process (DLP) projection device is provided. The DLP projection device includes a laser, a digital micromirror device (DMD), a projection lens, and a lens array. The laser emits laser light. The DMD receives the laser light emitted from the laser. The DMD includes a plurality of micromirrors arranged in an array, each of which reflects the laser light. The projection lens receives the laser light reflected from the micromirror, and projects the received laser light. The lens array is arranged between the laser and the DMD, and makes the laser light emitted from the laser uniform.

Abstract: A projection apparatus includes a plurality of light sources individually emitting light in a plurality of colors, a projection section using light from the light sources to generate images corresponding to respective plural color components of the light source light for each period, to sequentially project the images, a measurement section measuring a brightness of the light sources for each of the plurality of colors, an average brightness calculation section calculating, at each image projection term for the same color component, an average brightness of the brightness measured by the measurement section at the image projection term, and a light source control section adjusting the brightness of the light sources so that an average chromaticity based on the average brightness calculated by the average brightness calculation section and indicating the brightness is equal or approximate to a target chromaticity.

Abstract: An illumination apparatus that emits first illumination light, second illumination light and third illumination light, the illumination apparatus comprising: a first light source that emits excitation light; a light emitting body that emits the first illumination light by using the excitation light emitted from the first light source; a second light source that emits the second illumination light; a third light source that emits the third illumination light; and a combining unit configured to combine the first illumination light, the second illumination light, and the third illumination light, wherein an optical path length of the second illumination light from the second light source to the combining unit is equal to an optical path length of the third illumination light from the third light source to the combining unit.

Abstract: The present invention provides a scan-type image display device. In the scan-type image display device, laser light sources respectively generate light beams of green, red and blue, which in turn are combined by dichroic mirrors to generate a first beam and a second beam. A deflecting mirror device two-dimensionally scans the first and second beams under the rotation of a deflecting mirror thereof. The outgoing directions of the first and second beams have an angular difference relative to the vertical direction of a screen, and an interval between the first and second laser beams is set to be larger than an aperture diameter defined by laser safety standards.

Abstract: Provided is a laser light source apparatus capable of maintaining a favorable level of laser output and inhibiting a margin for optical axis adjustment required for other optical elements. The present invention includes: a semiconductor laser emitting excitation laser light; a laser medium excited by the excitation laser light and emitting infrared laser light; a wavelength conversion element converting a wavelength of the infrared laser light and emitting harmonic laser light; a concave mirror having a concave surface opposing the conversion element; and a mirror supporter supporting the concave mirror. The mirror supporter has a mouth that transmits laser light from the conversion element toward the concave mirror, and a contacting surface orthogonally intersecting an optical axis of the laser light from the conversion element and contacting the concave surface side of the concave mirror.

Abstract: An object-side lens group has different power factors between the vertical and horizontal directions of a liquid crystal panel, and a projection system as a whole therefore has different focal lengths between the vertical and horizontal directions and hence different magnification factors between the vertical and horizontal directions, whereby the aspect ratio of an image on the liquid crystal panel can be set at a value different from the aspect ratio of an image projected on a screen. That is, the projection system can convert the aspect ratio, which is the ratio of the width to the height of an image. When the distance between a diaphragm and an extreme end surface of the object-side lens group on the screen side satisfies a predetermined condition, at least a certain degree of telecentricity can be provided both in the vertical and horizontal directions.

Abstract: An illumination device includes a light source that is configured to emit diffused light, and a plurality of light guiding bodies configured such that the light emitted by light source is entered from one end surface and the light is exited from other end surface. End surface of each light guiding body is arranged into a concave shape, and end surface is arranged into a planar shape.

Abstract: A light source unit including an excitation light source for emitting light in a blue wavelength band, a fluorescent wheel, a light emitting device for emitting light in a red wavelength band and a light guiding optical system for guiding light emitted from the fluorescent wheel and the light emitting device to a light guiding device. The fluorescent wheel has a fluorescent area where a green fluorescent material layer for emitting fluorescent light in a green wavelength band is disposed and a diffuse area for converting light emitted from the excitation light source into diffuse light of which directivity is weak are disposed end to end in a circumferential direction. A concentration of weight content of the green fluorescent material and a thickness thereof are such that a luminescent intensity of fluorescent light emitted from the green fluorescent material layer is enhanced.

Abstract: A projector includes: capturing section that images an object on which an image is projected to produce a captured image; a projection distance information generating section that generates projection distance information representing a projection distance, which is the distance to the object on which an image is projected; a judging section that judges based on the projection distance information whether the projection distance exceeds a reference value; and a correcting section that performs trapezoidal distortion correction based on boundary lines of the object on which an image is projected contained in the captured image when the projection distance exceeds the reference value, whereas performing trapezoidal distortion correction based on at least coordinate information representing three-dimensional coordinates of the object on which an image is projected when the projection distance does not exceed the reference value.

Abstract: A high resolution projection system has a light source for generating and emitting light and a plurality of digital micromirror device imagers configured to receive and reflect the light.

Abstract: A projection system for projecting light such as images or content upon a liquid surface such as a lake or pool surface. The system includes an agitation assembly selectively operable to agitate a portion of the upper surface of liquid to form a projection screen. The system includes a projector assembly projecting or focusing light onto the projection screen on the upper surface of the liquid. The liquid is translucent to light, but the projection screen on the upper surface reflects a portion of the projected light due to the agitation. The agitation assembly may include an aeration system with a distribution manifold and is positioned below the liquid surface and has outlets discharging gas into the liquid such that air bubbles for the screen. The manifold outlets may be provided at two or more depths, whereby two or more portions of the projection screen are generated at differing times.

Abstract: An optical system includes a light source array, a dichroic mirror set, a light converting device and a light guide pipe. The light source array is used for emitting a first homogeneous light. The dichroic mirror set is disposed in a light path of the first homogeneous light and used for reflecting a part of the first homogeneous light to the light guide pipe, transmitting the remaining part of the first homogeneous light to the converting device. The light converting device is disposed in the transmitting light path of the dichroic mirror and used for transferring the first homogeneous light into a second, third homogeneous light. The dichroic mirror is further used for reflecting the second, third homogeneous light to the light guide pipe. The light guide pipe is used for mixing the first, second and third homogeneous light to obtain a white light.

Abstract: Three dimensional projection systems may be single projector or multiple projector systems. These 3D projection systems may include a polarization conversion system (PCS). The PCS may be designed for relatively small throw ratios and thus, may be designed to accommodate the small throw ratios. The PCS may include a polarizing beam splitter, a first optical stack, a reflector and a second quarter wave retarder. The first optical stack may include a rotator, a polarizer, a polarization switch and a first quarter wave retarder. The PCS may receive light from a projector and the PBS may direct the light toward the first optical stack. The light may be converted to a different polarization state as it passes through the first optical stack. The converted light may then be re-directed by a reflecting element to the second quarter wave retarder. The second quarter wave retarder may convert linearly polarized light to circularly polarized light.

Abstract: The invention relates to a deflection device for a projection apparatus for projecting Lissajous figures onto an observation field which is made to deflect a light beam about at least one first and one second deflection axis for generating Lissajous figures having a deflection unit for producing oscillations about the deflection axes and having a control apparatus for producing control signals for the deflection unit having a first and second control frequency which substantially corresponds to the resonant frequencies of the deflection unit, wherein the deflection unit has a quality factor of >3,000 and the control apparatus includes a feedback loop which is configured to regulate the first and/or second control frequencies in dependence on a measured phasing of the oscillations of the deflection unit so that the maximum amplitude of the oscillations remains in the resonant range of the deflection unit.

Abstract: A projector includes: a storing unit that stores setting data indicating a manual trapezoidal distortion correction system selected out of plural kinds of manual trapezoidal distortion correction systems; an operation unit that generates operation information; an imaging unit that picks up an image of a projection target area and generates a pickup image; an automatic trapezoidal distortion correction unit that performs automatic trapezoidal distortion correction; a projecting unit that projects, after the automatic trapezoidal distortion correction is performed, irrespectively of the manual trapezoidal distortion correction system indicated by the setting data, an adjustment instruction image for urging adjustment of a vertex position of a display planned area of the image in the projection target area; and a manual trapezoidal distortion correction unit that performs manual trapezoidal distortion correction on the basis of operation information indicating an adjustment instruction for the vertex position.

Abstract: A projection apparatus including an illumination system, a light valve, and a color filtering module is provided. The illumination system is capable of emitting an illumination beam. The light valve is disposed in the transmission path of the illumination beam and capable of converting the illumination beam into an image beam. The color filtering module is disposed in the transmission path of the illumination beam between the illumination system and the light valve and includes a plurality of colored filters and a gray filter. The gray filter is capable of reducing the intensity of the illumination beam passing through the gray filter. An image adjustment method is also provided.

Abstract: A lighting device configured to output light of predetermined color includes: a plurality of solid-state light sources including at least a first solid-state light source and a second solid-state light source; a drive section configured to drive each of the plurality of solid-state light sources individually; a first phosphor for excitation by first emission light emitted from the first solid-state light source; and a second phosphor for excitation by second emission light emitted from the second solid-state light source, and first fluorescence and second fluorescence are of different color.

Abstract: A reflector applied in a projector including a projection control circuit, a light source unit, a beam combiner, and a lens is disclosed. The reflector includes a transparent electrode layer, an electrophoresis layer and a pixel electrode layer. The electrophoresis layer includes a plurality of micro cups, each micro cup contains suspension therein and a plurality of charged particles. The pixel electrode layer includes a plurality of pixel electrodes corresponding to the micro cups. The projection control circuit provides voltages between each pixel electrode and the transparent electrode layer to drive the charged particles to migrate. When the charged particles arrive at the transparent electrode layer, the lights from the light source unit are reflected by the charged particles to the beam combiner to be combined into an image to be transmitted to the lens to project an image.

Abstract: An adjustment device for adjusting an angle of a dichroic mirror of a projector with respect to an optical engine base of the projector is disclosed. The dichroic mirror is pivotably mounted to the optical engine base. The adjustment device includes a link and an eccentric screw. The link has a first end and a second end. The first end is adapted to be fixedly mounted to the dichroic mirror. The second end has an opening. The eccentric screw is adapted to extend through the opening to be screwed to the optical engine base. The eccentric screw includes an eccentric section disposed within the opening. The eccentric section pushes the link such that the link drives the dichroic mirror to pivot with respect to the optical engine base upon rotating of the eccentric screw. A projector including the adjustment device is also disclosed.

Abstract: A recycling system and method for increasing the brightness of light output using at least one recycling light pipe with at least one light source. The output end of the recycling light pipe reflects a first portion of the light back to the light source, a second portion the light to the input end of the recycling light pipe, and transmits the remaining portion of the light as output. The recycling system is incorporated into a projector to provide color projected image with increased brightness. The light source can be white LEDs, color LEDs, and dual paraboloid reflector (DPR) lamp.

Abstract: In a projector lens system including at least three lens elements and telecentric on a side of an optical modulator, two of the lens elements located on outer most ends of the projector lens system facing conjugate points of the projector lens system consist of plastic lenses, and an aperture stop of the projector lens system is located between the two outer most lens elements while at least one of the lens elements other than the two outer most lens elements most adjacent to the aperture stop consists of a glass lens. Thereby, the cost and weight of the projector lens system can be reduced while achieving the required optical properties.

Abstract: An imaging system (200) is configured to reduce perceived speckle (106) in images (201) by introducing angular diversity into consecutively projected images. The imaging system (200) includes one or more laser sources (203) that are configured to produce one or more light beams (215). A light modulator (204) scans these light beams (215) to produce images. A light translation element (206) introduces the angular diversity by physically altering a light reception location (208) on the light modulator (204) between refresh sweeps. To preserve image stability, image data (220) in a memory (218) can be correspondingly shifted.

Abstract: A projector includes: spatial light modulation devices; and a cooling duct configured to flow a cooling air for sequentially cooling the spatial light modulation devices, the cooling duct has a first flow path formed by portions including the light entrance surface of at least one of the spatial light modulation devices for the respective color lights, a second flow path formed by portions including the light exit surface of the corresponding spatial light modulation device, and a junction area where the cooling air flowing through the first flow path and the cooling air flowing through the second flow path join each other, and the junction area is disposed at a downstream position of the cooling air with respect to the spatial light modulation device provided for a predetermined color light whose light amount is the maximum in the respective color lights that enter the light entrance surface.

Abstract: Disclosed is an optical unit for an image display device, the unit including: one or a plurality of light sources; one or a plurality of optical elements that control a spread of light; a combining element that combines the beams of light emitted from the light sources; and a scanning element, wherein the light from each of the light sources generates an elliptical beam spot on a screen and the spot has a major axis substantially perpendicular to a scanning direction, the result is that the unit is simple in structure, inexpensive, compact, lightweight, and capable of providing high-resolution image quality, thus providing the display device reduced dimensionally and in weight. Such an image display device using the optical unit is also disclosed.

Abstract: A light source unit includes a light emitting plate which has a plurality of segment areas and in which a luminescent material layer which emits light having a predetermined wavelength band by receiving excitation light and a transmissive portion which transmits light are formed on at least the plurality of segment areas, a primary light source for emitting excitation light on to the luminescent material, a secondary light source for emitting light having a wavelength band which differs from those of luminescent light emitted from the luminescent material layer and excitation light emitted from the primary light source, a light guiding optical system for guiding light emitted from the light emitting plate and light emitted from the secondary light source to the same optical path, and a light source control means for controlling the emission of light from the primary light source and the secondary light source.

Abstract: A laser projection system includes a laser module, a red, a green, and a blue fluorescent member, three collimators, a prism, and a scan system lens. The laser module emits laser beam of single wavelength. The red, green, and blue fluorescent members are excited by the laser beam from the laser module to emit red beam, green beam, and blue beam respectively. The collimators are on paths of the red, green, and blue beams respectively to collimate them. The prism reflects the collimated red, green, and blue beams to project them onto an imaging surface through the scan system lens.

Abstract: In accordance with embodiments of the present disclosure, a method for marking an image projected onto a surface includes capturing a second image from the surface, detecting the existence of a marking point in the second image, and modifying the first image by placing a graphic element at a location corresponding to a location of the marking point in the second image.

Abstract: A video projector includes a first discharge port from which a cooling current is sent out of a duct to an optical component. A cooling fan generates the cooling current which flows through the duct. The first discharge port includes first and second wall surfaces opposed to each other in an optical axis direction in which the light is transmitted through the optical component, third and fourth wall surfaces opposed to each other in a lateral direction perpendicular to the optical axis direction, a discharge port inlet into which the cooling current from the cooling fan is drawn, and a discharge port outlet from which the cooling current is sent toward the optical component. A gap between the first and second wall surfaces and a gap between the third and fourth wall surfaces become narrower from the discharge port inlet to the discharge port outlet.

Abstract: A projection optical system can achieve compactness and improve a state where polarized rays are separated by a polarized light separation section, without a separate optical system which makes the whole system telecentric, by using a reflective light valve. The projection optical system includes, in order, the reflective light valve, a projection lens and the polarized light separation section. The reflective light valve modulates incident illumination light in response to an input image signal and reflects and emits the modulated light. The projection lens transmits the illumination light incident to the reflective light valve and the modulated light emitted from the reflective light valve and is formed to be telecentric on the reduction side. The polarized light separation section separates the optical path of the illumination light incident to the projection lens from the optical path of the modulated light emitted from the projection lens.

Abstract: An image display apparatus includes a projector receiving an image signal and projecting image light and a screen including a projection plane of arbitrary shape. The projector and screen are connected with link mechanisms and link mechanisms. The relative position and posture between the projector and the screen are automatically or manually changeable. The relative position and posture between the projector and the screen are measured, and correction parameters for correcting distortion of image light projected from the projector onto the screen are calculated from the previously set viewing position of the viewer and the shape of the projection plane of the projector. Based on the calculated correction parameters, the image signal inputted into the projector is subjected to distortion correction processing. It is therefore possible to allow the viewer to see a clear image even if the position of the screen is changed.

Abstract: A beam combiner is for a multicolor laser display having an optical light source which has at least two semiconductor lasers, in which the beam combiner has a lens arranged in a beam path which is formed by beams emitted from the at least two semiconductor lasers, the lens is a diffractive optical element acting as the lens, the diffractive optical element has a plurality of optical axes, which are offset in a lateral direction with respect to one another, for various wavelengths of the semiconductor lasers, and the plurality of optical axes are offset in the lateral direction relative to one another such that an optical axis for one wavelength is in each case collinear with an emission direction of the semiconductor laser which emits this wavelength.

Abstract: A light production system for a projector is provided. The light production system comprises: at least one high pressure mercury arc lamp; at least one red laser; at least one green laser; and an integrator for receiving and combining light from the at least one high pressure mercury arc lamp, red light from the at least one red laser and green light from the at least one green laser, the integrator comprising an output enabled to emit combined light into illumination relay optics of the projector.

Abstract: A multimedia player for providing two projection images is provided. The multimedia player for displaying two projection images includes: a first projection unit displaying a first projection image; and a second projection unit displaying a second projection image. The first projection unit includes: a first driving unit controlling an operation of the first projection unit and providing an image signal on the first projection image to be displayed; a first light source unit; a first light modulation device outputting the first projection image by modulating light provided from the light source in response to the image signal of the first projection image; and a first projection lens unit magnifying and projecting an image that is output from the first light modulation device. The structure of the first projection unit is the same as that of the second projection unit. The multimedia player further includes a screen sensing unit sensing a color of an area in which an image is to be displayed.

Abstract: A projector with a laser light source projects an image. In order to reduce the risk for a person to be exposed to harmful levels of laser light, the projector also projects a time-variant alerting image into an alerting region. Alerting region is arranged outside of the projection region. The alerting image is of a wave length visible to the human eye, and of an intensity of eye-safe level.

Abstract: A display system comprising a light source and a plurality of switchable elements, wherein each element is switchable at an element switching frequency in accordance with an element control signal between an “on” state in which light is directed from the light source onto a display, and an “off” state in which light is not directed onto a display. The light source being configured to generate a pulsed light source output at a light source pulse frequency.

Abstract: An image processing apparatus for correcting image signals corresponding to a plurality of color images constituting an image, includes: a correction table storage unit storing one or more correction tables; a control register in which control data for specifying one of the one or more correction tables stored in the correction table storage unit for every color image is set; a correction amount calculating unit calculating a correction amount of each color image on the basis of the correction table specified by the control register; and an image signal correcting unit independently correcting the image signals of the color images on the basis of the correction amounts calculated by the correction amount calculating unit.

Abstract: A projection display apparatus includes: a light source; a spatial light modulation device modulating, on the basis of a video signal, each of primary color lights for color display emitted from the light source; projecting means for projecting, onto a screen, each of the primary color lights modulated by the spatial light modulation device; and correcting means for correcting, based on a given correction value, the video signal for each of the primary color lights so as to reduce misregistration between the primary color lights projected on the screen, and supplying the corrected video signal to the spatial light modulation device. The correcting means is configured to correct the video signal according to a single correction value such that a group of correction target points selected in a projected image on the screen are collectively processed as a single correction unit.

Abstract: An image projection system is disclosed. The system comprises a projector, a user input device and a computing device. The micro-mirror based projector projects an image including a cursor on a display plane. The present invention discloses various embodiments for the system and method of adjusting the brightness of the cursor to improve effects of a presentation. According to one embodiment, the brightness of the cursor is adjusted by modifying the on/off time ratio of the mirrors by which the cursor is formed. According to another embodiment, the projector comprises a first and a second micro-mirror array. The second array is dedicated for projecting the cursor image. The brightness of the cursor may be adjusted by changing the number of micro-mirrors by which the cursor is formed from the second array.

Abstract: A projector apparatus includes a light source configured to emit light beams of a plurality of color components, emissions of the light beams being controlled individually, a projection unit configured to form images respectively corresponding to the color components using the light beams from the light source for each frame and to sequentially project the images, a driving unit configured to drive the light source so that the light beams are emitted as light pulses having respectively predetermined pulse widths for a period in which the projection unit projects each of the images, a detector configured to detect deterioration levels of the light source respectively for the color components, and a controller configured to control the pulse widths of the light beams emitted from the light source based on the deterioration levels.

Abstract: In a light source device, in each division of an image frame, two or more of the color lights X, Y and Z (e.g., red, green and blue) can be projected simultaneously. Each of the color lights X, Y and Z is divided into two in terms of time so that synthesized light of one group of division color lights enters a first spatial modulation element. Synthesized light of another group of division color lights enters a second spatial modulation element, whereby gradation of each color light in each of the first and second spatial modulation elements is controlled.

Abstract: There is provided a light source unit comprising an excitation light shining device for emitting excitation light, a luminescent plate having a luminescent light emitting area on a base material and adapted to emit a luminescent light of a predetermined wavelength band by excitation light from the excitation shining device, two types of light source devices for emitting light of wavelength bands different from that of the light from the luminescent plate, a light guiding optical system for guiding the light from the luminescent plate and the rays from the light sources to a predetermined plane, and a light source control device for controlling the emission from the excitation light shining device and the light sources, wherein a synthetic light or a single-color light are emitted by controlling the emissions from the excitation light shining device and the light sources by the light source control device.

Abstract: An image display apparatus includes: a light source system that emits light having a first wavelength and a second wavelength switched with time; a light modulator that modulates the light having the first wavelength and the second wavelength emitted from the light source system; an optical path adjustment system that shifts the optical paths of the light having the first wavelength and the second wavelength modulated by the light modulator from each other; and the optical path adjustment system, wherein the optical path adjustment system includes a wavelength selecting surface that reflects the light having the first wavelength and transmits the light having the second wavelength, and mirror system disposed in such a way that the optical paths of the light having the first wavelength and the second wavelength having traveled via the wavelength selecting surface are shifted from each other.

Abstract: A wavelength conversion laser is provided with a solid-state laser having a cavity, and a wavelength converting element arranged within the cavity. The solid-state laser includes two or more types of laser crystals and oscillates solid-state laser light of multiple wavelengths. The wavelength converting element converts the solid-state laser light of multiple wavelengths into light of second harmonic waves and sum-frequency wave of multiple wavelengths and simultaneously generates the second harmonic waves and sum-frequency wave of multiple wavelengths. The wavelength conversion laser outputs converted wavelength light having a broad spectral width and low coherency, thereby enabling it to carry out highly efficient and stable high-output oscillation.

Abstract: A projector includes: a first solid-state light source device which includes a first solid-state light source emitting main excitation light, and a fluorescent layer converting main excitation light to light including a first color light component and a second color light component different from the first color light component, and emitting converted light; a second solid-state light source device which includes a second solid-state light source emitting a third color light component different from the first color light component and the second color light component; a light modulation device modulating the first color light component, the second color light component, and the third color light component in accordance with image information; a projection optical system projecting the modulated light components from the light modulation device as a projection image; and a third solid-state light source device which includes a third solid-state light source emitting auxiliary excitation light, wherein the fluo

Abstract: A projector, that projects an image on a projection surface in accordance with an image signal, includes: an optical system that includes a light source and projects projection light representing the image; an optical sensor that receives the light from the projection surface; and an adjuster that carries out a first adjustment process of adjusting the brightness of the projection light in accordance with the output from the optical sensor before the light source illuminates.

Abstract: A light source device, includes: an arc tube, and a pair of sealing portions; a reflector; and a sub mirror configured to reflect the light emitted from the arc tube toward the arc tube, and disposed of the other side of the sealing portion in such a manner as to cover a part of the outer surface of the tube spherical portion of the side of the illumination area, the sub mirror include a plurality of reflection members provided with reflection surfaces having different shapes, and the distance between the illumination axis and the outer shape of one of the adjoining reflection members is different from the distance between the illumination axis and the other of the adjoining reflection members.

Abstract: A LED light source module and a projection device comprising the same are provided. The LED light source module comprises an optical element assembly, a LED assembly and a compartment structure. The compartment structure extends from at least one side edge of the LED assembly to at least one side edge of the optical element assembly, so that the LED assembly, the optical element assembly and the compartment structure form an enclosed space corporately.

Abstract: Alight source device includes: light sources arranged in a plane; collimator lenses disposed in the vicinities of corresponding each of the light sources, each of the collimator lenses collimating a light beam emitted from the corresponding light source, and a holder that holds the light sources and the collimator lenses. The holder holds the light sources and the collimator lenses so that optical axes of the collimator lenses are respectively shifted parallel to optical axes of the light sources by shift lengths that are set so that light beams emitted from the light sources via the collimator lenses are focused on a certain region of an illumination subject body. The light beams emitted from the light sources are refracted by the collimator lenses and focused on the certain region.

Abstract: A projection apparatus including a light source, a light valve, a light uniforming device, and a first curved-surface reflection device is provided. The light source provides an illumination beam. The light valve is disposed on a transmission path of the illumination beam for converting the illumination beam into an image beam. The light valve has an active surface that substantially has a rectangular contour. The light uniforming device is disposed on the transmission path of the illumination beam and between the light source and the light valve. The first curved-surface reflection device is disposed on the transmission path of the illumination beam and between the light source and the light valve for reflecting the illumination beam to the light valve. A curvature of the first curved-surface reflection device along a first direction is not equal to a curvature of the first curved-surface reflection device along a second direction.

Abstract: A projection-type image display apparatus having a structure adapted so that the efficiency of the use of light and resolving power thereof can be enhanced. The projection-type image display apparatus includes a light source; a color separation unit separating incident rays according to predetermined wavelengths, and directing the separated rays at different angles; a lens array dividing the rays separated by the color separation unit into predetermined pixels; a driving portion driving the lens array to change the proceeding paths of the color rays; a polarizing beam splitter changing a proceeding path of incident rays depending on a direction of polarization; a reflection-type display device producing a color image using the rays entering via the polarizing beam splitter, and reflecting the color image toward the polarizing beam splitter; and a projection lens unit magnifying and projecting an incident image onto a screen. In addition, the projection-type image display apparatus may comprise.